TDR gajeriyar magana ce ta Reflectometry na yanki-lokaci.Fasaha ce mai nisa wacce ke yin nazarin raƙuman ruwa da ke nunawa kuma suna koyon matsayin abin da aka auna a wurin sarrafa nesa.Bugu da kari, akwai lokaci yankin reflectometry;Bada lokacin jinkiri;Transmit Data Register ana amfani da shi ne a masana'antar sadarwa a farkon matakin don gano inda kebul ɗin sadarwa ya lalace, don haka ana kiranta "Cable detector".Ma'aunin tunani na lokaci kayan aiki ne na lantarki wanda ke amfani da ma'aunin tunani na lokaci don tantancewa da gano kurakurai a cikin igiyoyin ƙarfe (misali, murɗaɗɗen igiyoyi ko igiyoyin coaxial).Hakanan za'a iya amfani da shi don gano abubuwan da aka dakatar a cikin haši, allunan kewayawa, ko kowace hanyar lantarki.
E5071c-tdr mai amfani da ke dubawa na iya samar da taswirar ido na kwaikwaya ba tare da amfani da ƙarin janareta na lamba ba;Idan kuna buƙatar taswirar ido na ainihi, ƙara janareta na sigina don kammala aunawa!E5071C yana da wannan aikin
Bayanin ka'idar watsa sigina
A cikin 'yan shekarun nan, tare da saurin haɓakar ƙimar ƙimar ma'aunin sadarwar dijital, alal misali, mafi sauƙin mabukaci na USB 3.1 bit bit har ma ya kai 10Gbps;USB4 yana samun 40Gbps;Haɓaka ƙimar bit yana sa matsalolin da ba a taɓa gani ba a cikin tsarin dijital na gargajiya sun fara bayyana.Matsaloli irin su tunani da asara na iya haifar da ɓarna na siginar dijital, wanda ke haifar da ƙananan kurakurai;Bugu da ƙari, saboda raguwar ƙimar lokaci mai karɓa don tabbatar da daidaitaccen aiki na na'urar, ɓacin lokaci a cikin hanyar sigina ya zama mahimmanci.Ragewar wutar lantarki da haɗaɗɗen haɗaɗɗiyar da aka samar ta hanyar iyawar da ba ta dace ba za su haifar da yin taɗi da sa na'urar ta yi aiki ba daidai ba.Yayin da da'irori ke ƙara ƙarami kuma suna ƙara matsawa, wannan yana ƙara samun matsala;Don yin mafi muni, raguwar ƙarfin wutar lantarki zai haifar da ƙananan sigina zuwa amo, yana sa na'urar ta fi dacewa da amo;
Haɗin kai tsaye na TDR shine impedance
TDR yana ciyar da motsin mataki daga tashar jiragen ruwa zuwa kewaye, amma me yasa naúrar TDR na tsaye ba ƙarfin lantarki bane amma impedance?Idan impedance ne, me yasa za ku iya ganin gefen tashi?Wadanne ma'aunai ne TDR ke yi dangane da Vector Network Analyzer (VNA)?
VNA kayan aiki ne don auna saurin amsawar ɓangaren da aka auna (DUT).Lokacin aunawa, ana shigar da siginar motsa jiki na sinusoidal zuwa na'urar da aka auna, sannan ana samun sakamakon ma'aunin ta hanyar ƙididdige ma'aunin haɓaka tsakanin siginar shigarwa da siginar watsawa (S21) ko siginar da aka nuna (S11).Ana iya samun halayen amsa mitar na'urar ta hanyar duba siginar shigarwa a cikin kewayon mitar da aka auna.Yin amfani da tace band pass a auna mai karɓa na iya cire hayaniya da siginar da ba'a so daga sakamakon aunawa da haɓaka daidaiton aunawa.
Tsarin tsari na siginar shigarwa, siginar da aka nuna da siginar watsawa
Bayan duba bayanan, IT an gano cewa kayan aikin TDR sun daidaita girman ƙarfin wutar lantarki na igiyar ruwa, sannan kuma yayi daidai da impedance.Ƙwararren tunani ρ daidai yake da ƙarfin lantarki wanda aka raba ta hanyar shigarwar shigarwa;Tunani yana faruwa ne a inda aka katse ƙugiya, kuma ƙarfin lantarkin da aka nuna a baya ya yi daidai da bambance-bambancen da ke tsakanin magudanar ruwa, kuma ƙarfin shigarwar ya yi daidai da jimlar impedances.Don haka muna da tsari mai zuwa.Tunda tashar fitarwa na kayan aikin TDR shine 50 ohms, Z0 = 50 ohms, don haka Z ana iya ƙididdige shi, wato, madaidaicin madaidaicin TDR da aka samu ta hanyar makirci.
Sabili da haka, a cikin adadi na sama, ƙaddamarwa da aka gani a farkon abin da ya faru na siginar ya fi ƙanƙanta fiye da 50 ohms, kuma gangaren yana da tsayayye tare da gefen tasowa, yana nuna cewa abin da aka gani yana daidai da nisa da aka yi tafiya a lokacin yaduwar gaba. na sigina.A wannan lokacin, impedance ba ya canzawa.Ina tsammanin yana da kyau a faɗi cewa ana ɗaukarsa kamar an tsotse gefen da yake tashi bayan raguwar impedance, kuma a ƙarshe ya ragu.A cikin hanyar da ta biyo baya ta rashin ƙarfi, ya fara nuna halayen haɓaka mai tasowa kuma ya ci gaba da tashi.Kuma a sa'an nan impedance ya wuce 50 ohms, don haka sigina ya wuce kadan kadan, sa'an nan kuma sannu a hankali ya dawo, kuma a karshe ya daidaita a 50 ohms, kuma siginar ya isa kishiyar tashar jiragen ruwa.Gabaɗaya, ana iya tunanin yankin da impedance ya faɗi a matsayin yana da nauyi mai ƙarfi a ƙasa.Yankin da impedance ya karu ba zato ba tsammani ana iya tunanin yana da inductor a jere.
Lokacin aikawa: Agusta-16-2022